Brandi Worley's husband and the father of the children was asleep in the basement of the Darlington home at the time of the killings and was unaware of what was happening upstairs, Casteel told reporters.

"I can't imagine the pain and the grief these families are experiencing this morning," Casteel said, pausing for a long time as he fought to hold back tears. "Please keep these families in your thoughts and prayers."

Brandi Worley was taken to Methodist Hospital in Indianapolis, where she is currently being treated for injuries to her neck, officials said.

Casteel said Brandi Morley did not seem remorseful when she admitted to the murders, describing her demeanor at that time as "matter-of-fact."

"We are not used to dealing with things like this," he said.

Deputies will question Brandi Worley as soon as her medical condition improves and are still in the process of interviewing witnesses, Casteel said.

A motive for the killings has not been released and the sheriff's office did not have any prior contact with Brandi Worley or the family's home before, the agency's calls for service showed.